Today, the editor will bring you AutoCAD drawing skills, hoping to help you.
1. Concepts and basic operations that need to be known
1. CAD is composed of many commands. There are various ways to execute the commands. There are basically two types. One is to input the command (or select the command button) and then execute the operation, and the other is to select first and then execute the command . There are many commands where both operations are possible.
Example: When deleting an object, you can select the delete command first, and then select the object, or you can select the object first and then select the delete command, the results of the two operations are the same. (Keyboard input E space, select object, space or select object, enter E space, the result is the same)
2. Transparent command. The execution process of most commands is single, that is to say, it can only be executed during the execution process, or it can be canceled halfway. But there are also some commands that can execute another command during the execution of a command, that is to say, the B command can be executed during the execution of the A command, and after the B command is executed, continue to execute the A command until the end. Such an order is called a "transparent order".
3. The way to select the object. There are two options: one is to select from upper left to lower right, and the other is to select from lower right to upper left. The selection results of the two methods are different. The first one: upper left to lower right; you can only select to the one that is pulled out The object completely surrounded by the frame; the second type: bottom right to top left; all objects that intersect with the virtual frame (including the surrounded objects).
4. Relative coordinates: Relative to the position of the current point (or the point you specified), this is very important! ! ! For example, if you want to draw a 1000mm line, select the command, then take any point from the screen, and then give a direction (move the mouse to the direction you want, if it is a horizontal or vertical line, you can press F8 to open the orthogonal) input 1000 carriage returns (or spaces) will get a 1000mm line, which is the simplest relative coordinate.
For example, if you want to draw a 1000X1000 square, you need to select the command first, then take any point on the screen, then enter "@1000, 1000" and press Enter (or space) to get a square. "@" represents relative coordinates. Also, if you want to draw a line with a length of 1000mm and an angle of 37 degrees in the horizontal direction, then you can select the line command, then take any point on the screen, and then enter "@1000<37" and press Enter. OK. These two methods must be remembered, must!
5. Keyboard operation:
a. You can directly input commands on the keyboard at any time, and execute commands without clicking somewhere.
b. You can enter the full name or abbreviation of the command.
c. The function of the space and the carriage return is the same, it is to execute the command, that is to say, you can execute the command by pressing the space or carriage return after entering the command.
d. If you want to continue with the previous command, you can press the space directly without re-entering the command or selecting the button.
6. Mouse operation:
Left button, needless to say.
Right button: Press the right button to confirm when executing the command, and press the right button to complete the continuous operation. Generally speaking, some of them are similar to spaces, but there are some shortcuts of the right button. Press the right mouse button when there is no command to execute, and there will be a menu. The default first one is to execute the previous command, and you can see the others yourself.
Wheel: Zoom in and out Double-click the wheel: Display all the current graphics, press and hold the wheel mouse to become a "little hand" to move the screen.
Flip the mouse over so the laser or scroll wheel is facing up, and there's an unexpected surprise—the mouse won't work.
2. Shortcut keys and basic preparations for drawing
1. F8 on/off. Orthogonal state: When the orthogonal state is turned on, only horizontal or numerical lines can be drawn at this time, and when moving or copying objects, only horizontal movement or numerical movement can be performed. It is very useful when drawing straight lines, so it is very important to get used to cutting flowers with F8.
2. F3 on/off. Automatic capture: When it is turned on, when you move the mouse to the object, there will be various shapes of yellow symbols. Different symbols represent different positions, such as □ represents the endpoint and △ represents the midpoint. It is very important to memorize these marks. important.
3. Set the capture. There are four words "object capture" at the bottom of the screen, click the right mouse button on it and select "Settings", you can see the meaning of various symbols, select what you need, or select all. Click "OK" to set up the capture. The function of pressing the left button is the same as F3, which is to turn on and off the automatic capture state!
4. Display of shortcut buttons. If you use another computer and suddenly find that his CAD has no shortcut button, or no label button, then you can call it out yourself. This is the case. Click the right mouse button on the gray area outside the black area and you will see the ACAD menu immediately. There is a large list on the surface, some are ticked √, some are not big, ticked, it means that there is a menu on the screen, if you have no marked menu, then you can find the marked and click on it, and the marked will come out. Then move to the location you like and it's OK!
5. CTRL+S to save. Operation method: press and hold CTRL and press the S key, such as pointing the CTRL key with the little finger of the left hand, pointing the S key with the middle finger of the left hand, and then release it. It is necessary to develop a habit and save it after every operation, because You can’t guarantee that the computer won’t crash at the next moment, and you can’t guarantee that the power will not be turned off at the next moment, and you can’t guarantee that there will be no “fatal errors” in CAD at the next moment. If you don’t save it, then your work of half an hour or more may be in vain. ! Therefore, it is very important to form this habit! Of course, you can also click the save button above, but I think it's so troublesome! After you develop the habit, you will not have the awareness of this operation, hehe, you can’t feel it! Remember, this is very important! ! !
6. Custom commands. First of all, you must remember the basic commands, but there are also custom commands, definition methods, tools-custom-edit custom files-program parameters, many of which start with ";" in front of acad.pgp, the first one does not start with The beginning of ";" is the beginning of the command. Generally, the commands under "3A, *3DARRAY" are the parts we want to edit, and don't move the other ones that you don't understand. For example, 3A means the shortcut key * followed by the full name of the command, that is to say, inputting 3A has the same effect as inputting 3DARRAY. Save after modification, close CAD, and reopen CAD, and your customized commands can be used.
7. ESC. Press the ESC key at any time to cancel the command being executed.
3. Basic commands
1. Line
command line
Shortcut command L
Operation method: input L→space→click the first point on the screen→click the second point, click the third point, and space to finish. Of course, you can also draw endlessly.
2. copy
command copy
Shortcut command CO (some CAD is C)
Operation method: input CO→space→select object→space→select datum point→choose where to copy to→space end Continuously copied, CAD2004 and later versions can be copied directly) If you want to copy the object with a distance of 1000mm, then do this "CO→space→select object→space→select reference point→input relative coordinates→space (if it is horizontal or vertical Vertical direction, then press F8 to open the orthogonal, use the mouse to give a direction, and then enter 1000 and then a space).
3. Move
command MOVE
Shortcut command M
Operation mode: same as copying
4. round
Command CIRCLE
Shortcut command C (different versions are slightly different and some are CIR CR)
Operation mode input C space click a little input diameter space or drag the mouse, click the left button to confirm.
5. Offset
Command OFFSET
Shortcut command O
Operation method: input O space Enter the offset distance Space (or specify the distance on the screen with two points) Select the object to be offset Click the mouse in the direction to be offset.
6. Format brush
Command MATCHPROP
Shortcut command MA
Operation mode Input MA space Select reference object Select the object to be brushed.
7. View properties
CommandPROPERTIES
Shortcut command MO
Operation mode Input mo to select an object (you can see the properties of the object, coating color, geometric size, etc.).
8. Array
Command: array
Shortcut command AR
Operation steps Enter AR space and a dialog box appears. If you want to generate a graph with 3 rows and 4 columns, then write 3 columns in the row and 4 in the column, and fill in the "offset distance and direction" below according to your own needs.
9. Extend
Command: EXTEND
Shortcut command EX
Operation mode Input EX space to select where you want to extend, space to select the extended line
Tip: There are lines or objects that may intersect in front of the lines
Tips: Enter EX space space to point the extended object to directly extend to the nearest object, continue to click the line to continue to extend to the next object.
10. Cut
Command: TRIM
Shortcut command TR
Operation method: the same trick as extend.
11. Delete
Command: ERASE
shortcut command E
Operation method: Enter E space, select object and press space (or select object and press E space).
12. Repent
Command: U
Operation method: Enter U space, as long as the CAD has not been closed, you can go back to the state when you open the drawing.
13. Explode
Command: EXPLODE
Shortcut command X
Mode of operation Input X space to select an object (or select an object and enter X space)
Tip: If it is a block, it may take a lot of blasting to explode, and some things cannot be exploded.
14. Stretch
Command: STRETCH
Shortcut command S
Operation method: Input S to draw a box in the way of right down and left up so that the vertical line on the left or the horizontal line on the top intersects with the drawn part, press the space to select a basic point, input the distance or specify the next point.
15. Mirror image
Command: MIRROR
Shortcut command: MI
Operation method: input MI to select the object to be mirrored, select the first point of the "mirror", select the second point of the "mirror", and press the blank space to get an image with the two points you selected as the axis of symmetry. 3. Why remember These 15 commands: Because there are many people who can operate CAD, you have to be different, you need faster operations to be better than others, it looks cool with a keyboard, and you need to be skilled in keyboard operations to be an awesome person. I can only point on the screen with the mouse, but I can't say that I can CAD.
The CAD function is very powerful, and the operation can also be very flexible. To draw a figure, there are various operation methods, such as drawing a square:
Method 1: Use the line command + relative coordinates to form a square
Method 2: Select the rectangle command + relative coordinates to generate a square
Method 3: Draw two vertical lines and use the offset to form a square
Method 4: Draw a line and generate a square with an array (circular array)
Method 5: Draw two vertical lines, use the copy command to copy the two lines respectively, and generate a square
Method 6: Draw two intersecting lines, copy the two lines, take the intersection point as the reference point, enter the relative coordinates, cut off the redundant lines to form a square.
So if you are familiar with these 15 commands, you can almost travel all over the world!
